Yes, my gauge is working. It is reading almost the exact same fuel level as the old, I took a photo before/after to compare. I've only put 45 min drive time on it so far, and no re-fuel yet.
I didn't tug super hard but I'm just not confident because it did come off several times. The other 3 hose connections yes, easy snap in, heard/felt the click, and am confident they're locked into place. This last one, no real click/lock feel. Like I said, I tinkered with it and I'm quite certain something is amiss with that connector on the fuel sender side. I think I'll order the new hose assembly and replace it for peace of mind.
This is the offending hose, it was also a total PITA to remove from the old fuel sending unit.